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(also attributively) A large, single block of stone which is a natural feature; or a block of stone or other similar material used in architecture and sculpture, especially one carved into a monument in ancient times.
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(also attributively and figurative) Anything massive, uniform, and unmovable, especially a towering and impersonal cultural, political, or social organization or structure.
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(chemistry) A substrate having many tiny channels that is cast as a single piece, which is used as a stationary phase for chromatography, as a catalytic surface, etc.
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(British, horticulture) A dead tree whose height and size have been reduced by breaking off or cutting its branches.